Cheapest return flights from Istanbul to Kathmandu in September from $510

AirHint found the following cheapest return flights from Istanbul (IST) to Kathmandu (KTM) in September 2025 (see full year).

Return flights

18 Sep - 25 Sep Air Arabia
21 Sep - 28 Sep Air Arabia
19 Sep - 26 Sep Air Arabia
22 Sep - 27 Sep Flynas
23 Sep - 30 Sep Air Arabia
25 Sep - 02 Oct Pegasus Airlines
26 Sep - 12 Oct Pegasus Airlines
23 Sep - 28 Oct Air Arabia Abu Dhabi
27 Sep - 24 Oct IndiGo
24 Sep - 01 Oct flydubai
21 Sep - 28 Sep Turkish Airlines direct
18 Sep - 25 Sep Turkish Airlines direct

Also check the deals for one-way flights from Istanbul to Kathmandu in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Feel free to contact us with any feedback or request another flight research.